1. Kalyan Kumar

2.  Atmospheric pressure
 Cyclones
 Anticyclones
 Instruments for measuring
 Volcanoes
 Conclusion
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3.  Force exerted by the weight of the air above
 Weight of the air at sea level
 14.7 pounds per square inch
 1 kilogram per square centimeter
 Units of measurement
 Millibar (mb) – standard sea level pressure is 1013.2 mb
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4. A center of low pressure
Pressure decreases toward the center
Winds associated with a cyclone
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5. A center of high pressure
Pressure increases toward the center
Winds associated with a cyclone
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7. Barograph
Barometer
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8.  The outer crust is made of rocks
 Underneath the crust is the mantle
 The gases push these melted rocks called ‘magma’
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9.  A Volcano is a special kind of mountain that builds itself
 There are several thousand volcanoes in the world
 Most of them are extinct
 Some are dormant
Arenal, Near Panama, Central America
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10. Prevention of formation of cyclones or volcanoes are not in
the realm of possibility. One of the mitigation measure
against disaster is the efficient warning system.
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